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⑪If you have to carry the aircraft to the take-off point with the engine running, be especially cautious.
Keep the propeller pointed away from you and walk well clear of spectators.
⑫Turn off the ignitor switch to stop the engine or fully close the throttle valve via the transmitter to shut off
the fuel supply. Otherwise there is a possibility of injury.
⑬Just after the engine stopped, the engine may start with a crank even the ignitor switch is off. Do not
crank the engine, or there is a possibility of injury.
⑭Be sure to equip an on/off switch between the ignitor and a battery, which you can reach from outside the
aircraft to stop the engine if it is started unintentionally with the transmitter turned off.
⑮The throttle linkage should be made as it can be remotely controlled to stop the engine in case of an
unintentional start.
3. OVERVIEW OF GT120THU
(1)
The engine is two-stroke gasoline engine designed for UAV aircrafts.
(2) The engine is equipped with an electric starter.
(3) The engine is equipped with a generator and a regulate rectifier to secure power supply (AC → DC
rectification and voltage regulation) for a long flight
(4) The engine is equipped with a throttle servo, a choke servo, a starter switch, a regulate rectifier and an
ignitor etc. onboard.
(5) The onboard generator OGA-200 of is a 3-phase alternating- current AC generator with an excellent
cooling system.
(6) The regulate rectifier is equipped with an open regulate circuit for high efficiency. The output can be
adjusted within 6V-30V.
(7)
The engine runs counter-clockwise when viewed from the front. Consult us if you want to run it reverse
rotation.
(8) This is an air-cooled engine. For keeping the engine always in an appropriate temperature condition, a fan,
a shroud or other cooling system of your own are needed.
(9)
The engine is only designed for UAV. Do not attempt to use it for any other purpose.
4. SPECIFICATIONS
(1) GT120THU engine
Type
：
2-stroke air - cooled engine
Displacement
：
119.82cc
Bore × stroke
：
44mm×39.4mm
Output power
：
about 10ps(7.4kW)/7,500rpm
Practical RPM range
：
1,500
～
8,000rpm
Weight
：
5,620g (silencer & accessories included)
Fuel
：
regular gasoline mixed with oil (gasoline
：
oil
＝
50
：
1)
Carburetor
：
Diaphragm type/ Tillotson HS type
Ignition method
：
battery CDI
Ignition plug
：
CM-6 type
Lubrication method
：
follow the lubrication instruction by the oil in the fuel
Fuel consumption
：
about 100cc/min/7,000rpm(full load)
Ideal condition
：
temperature -20
〜
50
℃
、
height 0
〜
3,000m
Durable time
：
over 500hrs (overhaul
：
every 100hrs)
(2)OGA-200 generator
Type: Three-phase AC generator
Back electromotive force constant: 1.43 mV / rpm
Number of poles: 4 poles
Rated voltage: 12 V
Maximum current: 25 A (20 min)
Rated current: 14 A
Phase to phase resistance: 35 mΩ
Gear ratio (GT 120 THU): 3.94: 1
Summary of Contents for GT120THU
Page 6: ...5 18 Fig 2 Fig 3...
Page 15: ...14 18 25 EXPLODED VIEW FIG 8...
